Answer: An organism that has inherited two of the same alleles of a gene from its parent is homozygous for that trait.
Explanation: Homozygous term is used for the organism which has
identical allele on both the chromosomes.
Homozygous organism can be of following two types :-
1 - Homozygous dominant -: In this ogranism carries two copies of the same dominant allele. Dominant alleles represented by capital letters eg. AA.
2 - Homozygous recessive - In this type organism carries two copies of the same gene which is recessive gene. Recessive alleles represented by small letters eg. aa.